[PATCH 01/29] mm: shrinker: add shrinker::private_data field

[Qi Zheng <qi.zheng@linux.dev>]

From: Qi Zheng <zhengqi.arch@bytedance.com>

To prepare for the dynamic allocation of shrinker instances
embedded in other structures, add a private_data field to
struct shrinker, so that we can use shrinker::private_data
to record and get the original embedded structure.

Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
---
 include/linux/shrinker.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
index 224293b2dd06..43e6fcabbf51 100644
--- a/include/linux/shrinker.h
+++ b/include/linux/shrinker.h
@@ -70,6 +70,8 @@ struct shrinker {
 	int seeks;	/* seeks to recreate an obj */
 	unsigned flags;
 
+	void *private_data;
+
 	/* These are for internal use */
 	struct list_head list;
 #ifdef CONFIG_MEMCG
-- 
2.30.2